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Carl Philipp Klemm 2026-02-06 09:29:05 +01:00
commit bb9002b03e
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#include <esp_wifi.h>
#include <freertos/event_groups.h>
#include <esp_log.h>
#define WIFI_SSID "UvosServerNet24"
#define WIFI_PASS "A159753654F"
#define MAXIMUM_RETRY 8
static const char *WIFI_TAG = "wifi station";
static EventGroupHandle_t s_wifi_event_group;
#define WIFI_CONNECTED_BIT BIT0
#define WIFI_FAIL_BIT BIT1
static int s_retry_num = 0;
static void net_event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data)
{
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START)
{
esp_wifi_connect();
}
else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED)
{
if (s_retry_num < MAXIMUM_RETRY)
{
esp_wifi_connect();
s_retry_num++;
ESP_LOGI(WIFI_TAG, "retry to connect to the AP");
}
else
{
xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
}
ESP_LOGI(WIFI_TAG,"connect to the AP fail");
}
else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP)
{
ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
ESP_LOGI(WIFI_TAG, "got ip: %s",
ip4addr_ntoa(&event->ip_info.ip));
s_retry_num = 0;
xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
}
}
void wifi_init_sta(void)
{
s_wifi_event_group = xEventGroupCreate();
tcpip_adapter_init();
ESP_ERROR_CHECK(esp_event_loop_create_default());
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &net_event_handler, NULL));
ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &net_event_handler, NULL));
wifi_config_t wifi_config =
{
.sta = {
.ssid = WIFI_SSID,
.password = WIFI_PASS,
.threshold.authmode = WIFI_AUTH_WPA2_PSK
},
};
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));
ESP_ERROR_CHECK(esp_wifi_start());
ESP_LOGI(WIFI_TAG, "wifi_init_sta finished.");
EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
pdFALSE,
pdFALSE,
portMAX_DELAY);
if(bits & WIFI_CONNECTED_BIT)
ESP_LOGI(WIFI_TAG, "connected to ap");
else if(bits & WIFI_FAIL_BIT)
ESP_LOGI(WIFI_TAG, "Failed to connect to ap");
else
ESP_LOGE(WIFI_TAG, "UNEXPECTED EVENT");
ESP_ERROR_CHECK(esp_event_handler_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, &net_event_handler));
ESP_ERROR_CHECK(esp_event_handler_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, &net_event_handler));
vEventGroupDelete(s_wifi_event_group);
}